getegid(2) - Linux man page
Name
getgid, getegid - get group identity
Synopsis
#include <unistd.h>
#include <sys/types.h>
gid_t getgid(void);
gid_t getegid(void);
Description
getgid() returns the real group ID of the calling process.
getegid() returns the effective group ID of the calling process.
Errors
These functions are always successful.
Conforming to
POSIX.1-2001, 4.3BSD.
Notes
The original Linux getgid() and getegid() system calls supported only 16-bit group IDs.
Subsequently, Linux 2.4 added getgid32() and getegid32(), supporting 32-bit IDs. The glibc getgid() and getegid() wrapper functions
transparently deal with the variations across kernel versions.
See Also
getresgid(2), setgid(2), setregid(2), credentials(7)
Referenced By
awk(1),
setgroups(2)